Steam vacuum pump



(N0 Model.)

V G, A. GEE-EVEN.

STEAM VACUUM PUMP.

No. 283,101. "Patented Aug. 14, 18.83.

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- WITNESSES:

ATTORNEY UNITED STATES PATENT OFFICE.

GEORG A. cimsvnmor BRUEHL, PRUssIA, GE

ST'EAM VAC u u PU M P SPEGIFIGATION forming part of Letters Batent No. 283,101, dated August 14, 18 83.

Application filed March 29, 1883. (No-model.) Patented in England December 1880, No. 5,484, and April 27, 1882, No. 1,988; in Belgium March 30, 1881, No. 54,252, aud'Apri129, 1882, No. 57,764 in France March 31, 1881, No. 142,031 in Austria April 19, 1881, No. 7,186, and August 18, 1882,No. 17,564, and in Germ'any May 19, 1881, No. 18,244, and April 9, 1882, No. 20,294.

To all whom may concern/.- I

Be it known that I, GEORG ALBERT GREE- VEN, of Bruehhin the Kingdom of Prussia and Empire of Germany, have invented certain new and useful Improvements in Steam Vacuum- Pumps, (for which Letters Patent have been granted to me in England, numbered 5,484, dated December30, 1880; Germany, numbered 18,244, dated May 19, 1881, and 20,294, dated April 9, 1882 France, numbered 142, 031, dated March 31, 1881, and patent of addition to No.

172, 031, dated May-4:, 1882 Belgium ,num'bered 54,252 dated March 30, 1881, and 57,7643, dated April 29, 1882, and Austria, dated April 19, 1881, and August 18,1882, and numbered- 7,186 and 17 ,56 1, respectively,) of which the following is a specification.

This invention has reference to improvements in steam vacuum-pumps of that class known as pulsometers, andmore especially to improvements in pulsometer-pumps having a single pump-chamber, whereby the raising of water or other liquids is obtained by the direct pressure of the steam on. the suriaceof such liquids, and without any steam-valve or other movable appliances for regulating the action of the steam, and by which a' certain I 7 expansion of the steam in the-pump-chamber can take place without allowing the heated surface of thewaterhnd'the steam to escape through the pressureyalve.

The invention consists, first, of certain improvements in the steam-admission valves of single-pump-chamberpulsometenpumps; and,

secondly, in an enlargement of the pumpchamber at the lower end of the same and at a point above the level of the pressure-valve, as will be more fully described hereinafter,

and finally be pointed out in the claims.

In the accompanying drawings, Figure1 represents a vertical longitudinal section of my improved steam-pump or pulsometer; and Figs. 2 and 3 are vertical transverse sections of the steam-admission valves, drawn on a larger scale, andshown as operated, respectively, by atmosphericpressure and by steampressure. Similar letters of reference indicate corre sponding ara;- I

In the drawings, a represents the'upper part into and out of the same.

?or neck of the pump-chamber A of a singlechamber vacuum-pump or pulsometer. w b is .the pipe or passage through which steam passes to the pump-chamber, said passage being regulated by a valve, 0, atthe' inside of a chamber, (1, at the upper end or neck, a, of the pump-chamber A. The valve 0 is formed of two parts, 6 e, of which the upper part, e, is

capable of movingvertically up and down toward and away from the orifice b of the steampipe b, so as to form, by its upper horizontal part orseat 6 contact with the end of the steam pipe b, and admit and interrupt thereby the flow of steam. The part c of the valve 0 moves -duct or passage, f, connects the chamber orspace inclosed by parts e e of the valve 0 with the atmosphere, so as to allow air to-pass freely In place of the airduct f, by which the valve 0 is operated by atmospheric pressure, the same may be operated by steam-pressure, in which case a pipe or passage, f, is used forcpnnecting the steampipe I) with the passagefand the chamber or spaceat the interior of the valve 0. The connecting steam pipe f" is provided ,Wlhh a tap or valve, fZ-for regulating the supply of steam to the valve 0. A small hole or passage, 6, at a the lower part of the fixedjvalve portion 6', has the effectof lessening the pressure of the steam withinthe valve, 0 during the time the pump is sucking, in consequence of which the valve goes down easier at the end of this time. By means of the passage 6, the valve 0 can act freely without requiring any further applltween the inside of the valve and the pumpchamber is formed.

In place of operating the valve 0 for its closing movement by atmospheric pressure or steam, hydraulic pressure or pressure obtained by springs or weights may be employed.

' ances, asthereby direct communication be- 7 The lower part of the pump-chamber A is provided with the usual suction and pressure valves, 9 g, of whichthe suction-valve g is in line with the center of the pump-chamber A,

while the pressure-valve g is arranged above IOO cape, of the heated surface of the water and steam through the pressure-valve is prevented.

The operation of my improved steam vacuum-pump is as follows: The steam entersin full force and without interruption through the neck of the pump-chamber when the movable part 6 of the valve C is in its lowest position, whereby the water is forced quickly down, closing the suction-valve and passing through the open pressure-valve into the dischargepipe. Whenthelevel of the water reaches the enlarged portion A, the steam expands and begins to condense, so that the pressure in the suction-pipe overcomes the steam-pressure. The suction action of the pump then takes place, which reaches its termination when the ascending water arrives at the upper narrowest part of the neck of the pumpchamber, as then an equilibrium of pressure is established in the pumpchamber. The alternating change between pressure and'vacuum produces regularly-occurring pulsations, and causes alternatelythe forcing out of the water inthe pumpchamber and the sucking in of a new supply of the same. As the line of condensation is located higher than the opening of the pressurevalve at a point where the enlargement of the pump-chamber begins, a considerable economy of steam takes place, owing to the fact that by the sudden enlargement of the water-surface in the enlarged portion of the pump-chamber the heated surface layer of. water and the steam .are not forced through the pressure-valve, but

are retained in the pump-chamber. The water rises with the heated surface layer during the period when the suction takes place, so that the steam that enters at the beginning of the next period of pressure does not strike an entirely cold but a heated water-surface, whereby a smaller quantity of steam condenses than in the pulsometer-pumps heretofore in use, in which the heated surface water and steam were forced out through the pressure-valve, after which condensation suddenly took place by the contact of the steam with cold surface-Water. WVhile the pulsometer is discharging the water the movable part of the valve 0 is in its lowest position, on account of the pressure of the steam on its upper surface; but when the water has been discharged and condensation has taken place, atmospheric air or steam, as the case may be, is drawn into the interior of the valve, and the movable part raised thereby and pressed upward into position to effect the closing of the steam-passage and interrupt the supply of steam to the steam-chamber.

In case steam is employed to actuate the valve 0, the supply of steamcan be so regulated by means of the valve f 2 thatthe surplus of pressure within the valve over the pressure outside of it causes the movable part to ascend,

and thereby to interrupt the flow of steam to the pump-chamber before the water is entirely discharged therefore before the beginning of condensation in the pump-chamber.

Two or more pulsometers provided with the valve arrangement described for regulating the action of the steam may be combined to work together, if desired.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1: Ina one-chamber steam Vacuum-pump or pulsometer, the combination, with the pumpchamber and steam-supply pipe, of a valve .arranged in a chamber at the upper end of the neck of the pump-chamber, said valve consisting of a fixed part having an air or-steam supply duct or passage, and of a movable part, whereby the passage of steam to the pumpchamber is regulated and the valve actuated by the difference of pressure within and without said valve, substantially as described.

2. In a one-chamber steam vacuum-pump or pulsometer, the combination of a pump-chamber, A, having an enlarged portion, A, atthe lower part, said portion A being laterally extended and provided with a seat for the pressure-valve below the level of the enlargement of the pump-ch amber, and with a suction-valve below the pressure-valve and in line with the axis of the pump-chamber, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

GEORG ALBERT GREEVEN.

Witnesses: K

SAMUEL SPACKMAN, TH. PEITMAN. 

